microstructural magnetic and optical properties of zno cu nanocluster assembled films and zno cu sio2 nanocomposite
evaluation of shape and size effects on optical properties of zno pigment
... nm and thicknesses of 50 nm In Fig 2(c) and (d), FE-SEM images of the submicrorods ZnO is shown The diameters of ZnO rods are about 100 nm and their lenghts are up to m The FE-SEM images of ... large scale, and all of the nanorods have diameters of about 50 nm and lengths of 300 nm Fig (i–k) exhibits the FESEM images of nanoparticle-decorated ZnO pigment The surface of ZnO pigment was ... is due to ZnO band gap and this phenomenon is one of the most important ZnO characteristics [14] The particle sizes of scale-like and submicrorod ZnO pigments are in the optimum range of 0.25–0.45...
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Báo cáo hóa học: " Effects of silver impurity on the structural, electrical, and optical properties of ZnO nanowires" doc
... impurities and is helpful in understanding the optical and electrical performances of the materials We focused on the temperature-dependent PL measurements of various silver-doped ZnO (SZO) NWs ... Photoelectric properties of ZnO films doped with Cu and Ag acceptor impurities Semiconductors 2003, 37:259 25 Kang HS, Ahn BD, Kim JH, Kim GH, Lim SH, Chang HW, Lee SY: Structural, electrical, and optical ... ablation and deposition of thin films Chem Soc Rev 2004, 33:23 31 Kim KK, Kim HS, Hwang DK, Lim JH, Park SJ: Realization of p-type ZnO thin films via phosphorus doping and thermal activation of the...
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Báo cáo sinh học: " Influence of helium-ion bombardment on the optical properties of ZnO nanorods/p-GaN light emitting diodes" pot
... physical properties of ZnO nanostructures [19] The irradiation changes the amount of defects in ZnO nanorods resulting in changes in the optical properties of ZnO The effect of the ion irradiation of ... Influence of helium-ion bombardment on the optical properties of ZnO nanorods/p-GaN light-emitting diodes N H Alvi*1, S Hussain1, J Jensen2, O Nur1, and M Willander1 Department of Science and Technology ... influence the optical and electrical properties of heterojunctions The p-GaN as a substrate is a good candidate that has small lattice mismatch with ZnO There is only few growth reports of n -ZnO nanorods...
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báo cáo hóa học:" Influence of helium-ion bombardment on the optical properties of ZnO nanorods/p-GaN light emitting diodes" pdf
... physical properties of ZnO nanostructures [19] The irradiation changes the amount of defects in ZnO nanorods resulting in changes in the optical properties of ZnO The effect of the ion irradiation of ... Influence of helium-ion bombardment on the optical properties of ZnO nanorods/p-GaN light-emitting diodes N H Alvi*1, S Hussain1, J Jensen2, O Nur1, and M Willander1 Department of Science and Technology ... influence the optical and electrical properties of heterojunctions The p-GaN as a substrate is a good candidate that has small lattice mismatch with ZnO There is only few growth reports of n -ZnO nanorods...
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Effects of carbon on optical properties of zno powder
... Results and discussion Fig shows FESEM images of the powders before and after milling with 4% C and post annealing at different temperatures The source ZnO material is in the form of rods and particles ... pure Ar gas environment) Fig shows X-ray diffraction patterns of ZnO and C-doped ZnO powders The patterns of the initial ZnO and ZnO doped with 4% C at various temperatures are shown in Fig 2a ... new peaks at 1324 and 1594 cm À in comparison to source ZnO The Raman mode at 1594 cm À is a characteristic of graphitic Fig FTIR spectra of ZnO source material and ZnO: C (2, 3, and 4%C) annealed...
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Báo cáo hóa học: " Temperature dependent optical properties of single, hierarchically self-assembled GaAs/AlGaAs quantum dots" potx
... (solid line) and from an ensemble of GaAs QDs (dashed line) For the excitation of the ensemble sample, the laser light was focused using a · microscope objective to a spot diameter of 20 lm and about ... excitation power of % 480 Wcm–2 with integration times of s The PL lines located at 1.429 eV, 1.581 eV, and 1.708 eV are assigned to bulk GaAs, the first excited state of the single GaAs QD, and the quantum ... we display a typical temperature variation of the peak position energy and the homogeneous linewidths of the X PL-line of a single GaAs QD (T £ 100 K) and QD ground-state (T > 100 K) deduced from...
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fabrication and optical properties of ordered sea urchin-like zno
... well-crystallized particles of prepared ZnO Fig 1b shows the UV–visible optical absorption characteristics of the sea urchin-like ZnO Excitonic absorption peak of the ZnO sample is at about 360 ... results of Fig 2d For analyzing the photoelectric properties of the sea urchin-like ZnO nanostructures, simple battery devices were fabricated Fig shows the I–V curve of the sea urchin-like ZnO nanostructures ... Fig 3, the current density at short circuit (Jsc), voltage at open circuit (Voc), fills factor (FF) and efficiency of power conversion (η) are better than those of our previous work ZnO nanorod...
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Báo cáo hóa học: " Synthesis, magnetic and optical properties of core/shell Co1-xZnxFe2O4/SiO2 nanoparticles" pot
... investigate the effect of Zn2+ partially substituting for Co2+ in CoFe2O4 nanoparticles (Co1-xZnxFe2O4; x = 0, 0.5, and 1) and shelling with silica on the magnetic and optical properties of the ferrite ... condensation of TEOS on the surface of nanoparticles was achieved Finally, the core/shell CoFe2O4 /SiO2, Co0.5Zn0.5Fe2O4 /SiO2, and ZnFe2O4 /SiO2 particles were separated using external magnet, and washed ... measure the magnetic properties and diffuse reflectance of the prepared ferrite nanoparticles, respectively Results and discussion Figure 1a, b, c shows the X-ray diffraction patterns of core/shell...
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báo cáo hóa học:" Structural and optical properties of a radio frequency magnetron-sputtered ZnO thin film with different growth angles" pdf
... effect of the films for optical properties The thickness of the ZnO thin films was checked by FE-SEM and was fixed at 100 nm Three growth angles (0°, 15°, and 30°) of the columnar ZnO films were ... Page of (a-2) (b-2) (c-2) Figure FE-SEM images of ZnO films with various growth angles ZnO films at (a-1) 0°, (b-1) 15°, and (c-1) 30° growth angles and their enlarged images (a-2, b-2, and c-2) ... condition on average and low values The transmittance and reflectance are slightly changed by the growth angle of ZnO films Figure shows the reflectance patterns of the ZnO films with different...
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DEFECT INDUCED NOVEL ELECTRICAL, MAGNETIC AND OPTICAL PROPERTIES OF TIO2 THIN FILMS GROWN BY PULSED LASER DEPOSITION
... same I-V curve is expanded by plotting at lower current scale and dI/dV curve on logarithmic scale (b) Two spatially averaged I-V curves (black and red) acquitted at temperatures 78 K and 300 ... application of identification of compounds, there are a large number of reported works on the characterisation of concentration and mobility of free carriers, strain and crystal quality, determination of ... applications The objective of this thesis is to investigate the defect induced electrical, optical, magnetic and structural properties of titanium dioxide (TiO2) thin films grown by pulsed laser...
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Electronic, magnetic and optical properties of atomically controlled complex oxide heterostructures and interfaces
... ELECTRONIC, MAGNETIC AND OPTICAL PROPERTIES OF ATOMICALLY CONTROLLED COMPLEX OXIDE HETEROSTRUCTURES AND INTERFACES XIAO WANG (B.Sc, Shandong University, P.R China) A THESIS SUBMITTED FOR THE DEGREE OF ... Xie, Dr Jiabo Yi, Tom Wijnands, Wentao Xu, Dr Kalon Gopinadhan, Prof Alexander Brinkman, Asst Prof Wei Chen, Prof Ganaphathy Baskaran, Assoc Prof Jun Ding, Asst Prof Andrivo Rusydi, Joost Beukers, ... selective occupancy of interface subbands of the nearly degenerate Ti orbital in the STO To explore new type of interfaces and to understand the driving mechanisms behind the emerging properties...
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Electronic, magnetic and optical properties of oxide surfaces, heterostructures and interfaces role of defects
... and magnetic properties of SrRuO3/LaAlO3 (SRO/LAO) superlattices By varying the thickness of SRO layers in the superlattices, we are able to modulate both electrical and magnetic properties of ... (ZFC) M-T curves of 0.05 wt% and 0.1 wt% NSTO (Inset) M-H curves at K 167 Figure 5.21 ZFC M-T curve of 0.5 wt% NSTO 167 Figure 5.22 M-H curves of 0.5 wt% NSTO at K, 30K and 300 K ... structure 207 Figure 6.24 I-V curves of a Cu/ NAO (100 nm)/NSTO structure 208 Figure 6.25 I-V curves of a Cu/ NAO (50 nm)/NSTO structure 208 Figure 6.26 I-V curves of a Cu/ YAlO3 (YAO) (150 nm)/NSTO...
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DSpace at VNU: STUDY OF MICROSTRUCTURE AND OPTICAL PROPERTIES OF PVA-CAPPED ZnS : Cu NANOCRYSTALLINE THIN FILMS
... optimal Cu concentration of about 0.2% We shall henceforth focus our presentation and discussion on the measurement results of the optimally Cu- doped samples (P-ZnS : Cu) of PVA-capped nanopowder and ... 4, the direct band gap can be calculated yielding the values of about 3.90 eV, 3.86 eV, 3.77 eV and 3.73 eV for the F-ZnS : Cu- PVA1, F-ZnS : Cu- PVA2, F-ZnS : Cu- PVA3 and F-ZnS : Cu- PVA4 thin films, ... effective mass of the electron in ZnS : Cu Conclusion We produced successfully the ZnS : Cu nanopowders with different Cu concentrations and the F-ZnS : Cu- PVA1, F-ZnS : Cu- PVA2, F-ZnS : Cu- PVA3 and F-ZnS...
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Effects of simultaneous doping with boron and phosphorous on the structural, electronic and optical properties of silicon nanostructures
... effects of size and shape of Si-nc on the incorporation of group-III (B and Al), group-IV (C and Ge) and group-V (N and P) impurities Single-doping has been investigated both in spherical and faceted-like ... approaching asymptotically the value of the band-gap of the undoped Si-nw This is another indication of how doping can modify the electronic and optical properties of the Si nanostructures Conclusions ... that the electronic properties of B- and P-codoped Si-nc are qualitatively and quantitatively different from those of either B- or P- single-doped Si-nc The presence of both a n and a p impurity...
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First principles optical properties of silicon and germanium nanowires
... simple EMA models Optical properties of SiNWs and GeNWs In Section of the present paper, we aim to point out the importance of the many-body effects on the optical response of some of the studied ... for the calculation of band structures and optical properties is given in the paper by Del Sole et al., in this volume In short, through a DFT-LDA calculation [34,35], with the use of norm-conserving ... in terms of the different geometrical structure of wires grown with different orientation Finally the comparison of the optical spectra of SiNWs and GeNWs with diameters of the order of 0.8 nm,...
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Electronic structure and magneto optical properties of solids v antonov, b harmon, a yaresko
... 2.1.8 Fe3O4 and Mg2+ -, or Al3+ -substituted magnetite Magneto -optical properties of magnetic multilayers 2.2.1 Magneto -optical properties of Co/Pd systems 2.2.2 Magneto -optical properties of Co/Pt ... the MO properties of elemental ferromagnetic metals (Fe, Co, and Ni) and paramagnetic metals in external magnetic fields (Pd and Pt) Also TLFeBOOK xii ELECTRONIC STRUCTURE AND MO PROPERTIES OF SOLIDS ... Se, and Te) 3.2.3 UCu2 P2 , UCuP2 , and UCuAs2 3.2.4 UAsSe and URhAl 3.2.5 UGa2 3.2.6 UPd3 229 229 230 239 248 265 273 286 308 320 322 327 332 338 341 346 XMCD PROPERTIES OF d AND f FERROMAGNETIC...
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synthesis and optical properties of colloidal tungsten oxide nanorods
... and the intensity of this peak increases relative to that of UV emission as the length of nanorods increases A similar PL pattern with two emission maxima, yet at much lower energies of 2.8 and ... band gap due to impurities.22b In light of these assignments, we suggest that the UV emission of nanorod samples in this work might correspond to the band-toband transition The blue emission of ... COMMUNICATIONS Comparing the intensities of the (010) and (014) peaks of the sample with those of the bulk W18O49, it was found that the relative intensity of (010) has been dramatically increased...
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characterization and optical property of zno nano-,
... images of the ZnO nanorods; (c) low- and (d) high-magnification FESEM images of the ZnO submicrorods and (e) low- and (f) high-magnification FESEM images of the ZnO microrods detailed morphology of ... characterization and optical properties of star-like ZnO nanostructures, Mater Lett 64 (2010) 898–900 [28] Y.H Ni, X.W Wei, J.M Hong, Y Ye, Hydrothermal preparation and optical properties of ZnO nanorods, ... diameters of about 200 nm and lenghts of lm Fig 2e and f shows the SEM images of the ZnO microrods The lower magnification image (2e) indicates that ZnO microrods highly disperse have diameters of about...
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